If the spark plug thread in the cylinder head gives way, you can no longer expect proper compression.
We will carry out a professional repair using a special threaded bushing. The connection is then gas-tight and fully resilient again.
The bushing is incorporated in its position and not glued. A durable and safe solution.
We make this possible in the heads of all 250, 400 and 500cc engines. SR XT TT
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